Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2004-08-05
Physics
Nuclear Physics
Nuclear Experiment
6 pages; 4 eps figures; uses dis04.cls; Submitted talk presented at the "XII International Workshop on Deep Inelastic Scatteri
Scientific paper
Measurements of the production of high energy pi0 mesons at large pseudorapidity, coincident with charged hadrons at mid-rapidity, for proton+proton and deuteron+gold collisions at sqrt(s)_NN=200 GeV are reported. The p+p cross section for inclusive pi0 production follows expectations from next-to-leading order perturbative QCD. Both the inclusive cross section and the di-hadron azimuthal correlations are consistent with a model where parton showers supplement leading-order pQCD. A suppression of the back-to-back azimuthal correlations was observed in d+Au, qualitatively consistent with the gluon saturation picture.
Ogawa Akio
STAR collaboration for the
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